Title 26 › Subtitle Subtitle D— Miscellaneous Excise Taxes › Chapter 36— CERTAIN OTHER EXCISE TAXES › Subchapter A— Harbor Maintenance Tax › § 4462
Sets rules for when a tax applies to loading or unloading commercial cargo at U.S. ports and says who is covered or free from the tax. It gives short definitions: "port use" means loading or unloading commercial cargo; "port" means a U.S. channel or harbor open to public navigation but not inland waterways, excluding places that have not gotten Federal money since 1977 or were deauthorized before 1985, and counting the Columbia River only up to the downstream side of Bonneville lock and dam. "Commercial cargo" means goods or paying passengers on a commercial vessel, but not bunker fuel, ship supplies, or fish not yet landed. "Commercial vessel" means a ship carrying cargo for hire or as the owner’s business, but not ferries that run daily on set schedules. "Value" means the usual commercial paperwork value or the fare paid for a passenger. The law lists many exceptions and rules. No tax is charged for cargo moved between the continental U.S. (not including Alaska) and Alaska, Hawaii, or U.S. possessions when for use there, with crude oil excluded for Alaska. If the vessel’s fuel was taxed under section 4042, then this tax does not apply. Exports, the U.S. government, and certain nonprofit or cooperative aid shipments certified by Customs are also exempt. Only one tax is charged for the same cargo when it is loaded and unloaded, movement inside a port is not taxed by itself, and relay cargo under one bill of lading is taxed once. Customs rules apply for collection and enforcement, and the Secretary can make regulations about payment, bonds, practical exemptions, and penalty relief.
Full Legal Text
Internal Revenue Code — Source: USLM XML via OLRC
Legislative History
Reference
Citation
26 U.S.C. § 4462
Title 26 — Internal Revenue Code
Last Updated
Apr 5, 2026
Release point: 119-73not60